1000kV lattice type steel structure quadrilateral variable cross-section column in high altitude area

Abstract

The utility model relates to the technical field of electrical equipment installation, aims to solve the problems that in the prior art, a framework is high in height, large in equipment load, high in gravity center, large in horizontal earthquake force borne by the structure, prone to instability, large in steel consumption, high in cost and large in investment, and provides a 1000kV lattice type steel structure quadrilateral variable cross-section column in a high altitude area. The top ends of the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe are mutually inclined, close to each other and distributed at intervals; a plurality of connecting pieces are connected in gaps among the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe; an equipment room and a cantilever frame are arranged at the top ends of the support columns, and shock absorbers are arranged on the top face of the cantilever frame. The utility model has the beneficial effects of low framework height, small equipment load, low gravity center, small horizontal earthquake force on the structure, low possibility of instability, small steel consumption, low cost and low investment.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment installation, in particular to a 1000kV lattice steel structure quadrilateral variable-section column in high-altitude areas. Background Art

[0002] The world's highest altitude 1000kV substation project is the first to be implemented in China and even in the world. Compared with conventional altitude substations, UHV substations with an altitude of more than 3000m and a seismic fortification intensity of 8 degrees need to consider high altitude correction, new body, large changes in equipment layout, high equipment installation height, and large earthquake effects. Electrical equipment also has higher requirements for the stability of related structural components. At present, there is no UHV substation in China with an altitude of more than 3000m and located in the 8-degree fortification zone that uses a quadrilateral variable-section steel tube lattice equipment support column solution composed of steel tubes and angle steel materials.

[0003] The current support columns used in high altitude and high seismic intensity areas have the disadvantages of high frame height, large equipment load, high center of gravity, large horizontal seismic force on the structure, easy instability, large steel consumption, high cost and large investment. Utility Model Content

[0004] The utility model aims to provide a 1000kV lattice steel structure quadrilateral variable cross-section column for high-altitude areas to solve the problems of high frame height, large equipment load, high center of gravity, large horizontal earthquake force on the structure, easy instability, large steel consumption, high cost and large investment in the prior art.

[0005] The embodiment of the utility model is achieved as follows:

[0006] The utility model embodiment provides a 1000kV lattice steel structure quadrilateral variable cross-section column for high altitude areas, which includes a bracket column;

[0007] The support column comprises a first steel pipe, a second steel pipe, a third steel pipe and a fourth steel pipe, wherein the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe are parallel to each other and arranged at intervals, and the top ends of the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe are inclined to each other and arranged at intervals;

[0008] A plurality of connecting pieces are connected in the gaps between the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe;

[0009] An equipment room is provided at the top of the support column, a cantilever frame is provided on one side of the equipment room, one end of the cantilever frame is fixedly connected to the top of the support column, and a shock absorber is provided on the top surface of the cantilever frame.

[0010] During installation, the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe of the support column are arranged in a rectangular cross-section so that the top cross-sections of the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe are smaller than the bottom cross-sections, and then fixed between the first steel pipe and the second steel pipe or the second steel pipe and the third steel pipe or the third steel pipe and the fourth steel pipe or the fourth steel pipe and the first steel pipe through a number of connecting parts. The equipment room and the cantilever frame are both installed at the top of the support column. Finally, the shock absorber is installed on the cantilever frame.

[0011] The 1000kV lattice steel structure quadrilateral variable cross-section column in high-altitude areas disclosed in this implementation scheme adopts a quadrilateral cross-section type cross-section layout, and a shock absorber is arranged on the above-mentioned cantilever frame at the top of the above-mentioned support column, thereby making the 1000kV lattice steel structure quadrilateral variable cross-section column in high-altitude areas have the beneficial effects of low frame height, small equipment load, low center of gravity, small horizontal seismic force on the structure, not easy to become unstable, small steel consumption, low cost and small investment.

[0012] Optionally, the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe are distributed in a quadrilateral cross-section type.

[0013] With this arrangement, the quadrilateral cross-section type has a low height, a small equipment load, a low center of gravity, a structure that is subject to small horizontal seismic forces and is not prone to instability, while also using less steel and saving investment.

[0014] Optionally, some of the connecting members have some node plates, and the node plates are evenly and staggeredly distributed on the adjacent first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe.

[0015] With such arrangement, the node plates can support the connection between the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe, thereby making the relative positions of the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe more stable.

[0016] Optionally: a plurality of support rods are provided between the node plates between the adjacent first steel pipe and the second steel pipe, the second steel pipe and the third steel pipe, the third steel pipe and the fourth steel pipe, or the fourth steel pipe and the first steel pipe, and a first connecting piece and a second connecting piece are respectively provided at both ends of the plurality of support rods, and the first connecting piece and the second connecting piece are respectively fixedly connected to the two ends of the support rod along the axis of the support rod;

[0017] The first connecting plate and the second connecting plate are respectively bolted to the node plates between the adjacent first steel pipe and the second steel pipe, the second steel pipe and the third steel pipe, the third steel pipe and the fourth steel pipe, or the fourth steel pipe and the first steel pipe.

[0018] With such arrangement, the first connecting pieces and the second connecting pieces at both ends of the support rods are connected to the node plates, which is convenient for installation and disassembly, while ensuring the overall stability and earthquake resistance of the support column.

[0019] Optionally: the bottom ends of the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe are respectively provided with a first bottom plate, a second bottom plate, a third bottom plate and a fourth bottom plate, and the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe are respectively welded to the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate.

[0020] With such arrangement, the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate can improve the stress-bearing performance of the steel structure, save steel material, and well control the instability and deformation of the steel structure, have the effect of dispersing stress, and are less affected by horizontal earthquakes.

[0021] Optionally: a plurality of reinforcement members are provided at the angles between the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe and the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate, and the plurality of reinforcement members are evenly distributed along the radial direction of the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe and welded at the angles between the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe and the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate.

[0022] With such arrangement, the plurality of reinforcing members can strengthen the connection strength between the first steel tube, the second steel tube, the third steel tube and the fourth steel tube and the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate, thereby improving the supporting effect and preventing the first steel tube, the second steel tube, the third steel tube and the fourth steel tube from collapsing under the action of an earthquake.

[0023] Optionally: the bottoms of the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate are all provided with a base, and the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate are all bolted to the base.

[0024] With such arrangement, the base can lower the center of gravity of the support column, effectively control the overall instability and deformation of the structure, and improve the reliability of related equipment in areas with high altitudes and high seismic intensity.

[0025] Optionally: a plurality of anchor rods are vertically penetrated through the above-mentioned first bottom plate, the above-mentioned second bottom plate, the above-mentioned third bottom plate and the above-mentioned fourth bottom plate, one end of the plurality of anchor rods is embedded in the above-mentioned base, the other end of the plurality of anchor rods has an external thread, and the other end of the plurality of anchor rods is located at the top of the above-mentioned first bottom plate or the above-mentioned second bottom plate or the above-mentioned third bottom plate or the above-mentioned fourth bottom plate, and a plurality of nuts are threadedly connected to the external threads of the plurality of anchor rods.

[0026] With such a configuration, a plurality of pre-buried anchor rods are used to fix the first base plate, the second base plate, the third base plate and the fourth base plate, so that the support columns are more firmly fixed to the ground, while improving the pressure-bearing capacity of the support columns, effectively avoiding the support columns from becoming unstable and deformed due to earthquakes, and being suitable for environments in high altitudes and high seismic intensity areas.

[0027] Optionally, a gasket is provided between the plurality of nuts and the first bottom plate, the second bottom plate, the third bottom plate, or the fourth bottom plate, and the gasket is sleeved on the external threaded sections of the plurality of anchor rods.

[0028] With such arrangement, the gasket effectively protects the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate, avoids unnecessary wear of the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate, and increases the overall service life of the steel frame.

[0029] Optionally: the bottom and top cross-sections of the above-mentioned support column are both square, and the bottom cross-section of the above-mentioned support column is larger than the top cross-section of the above-mentioned support column.

[0030] Such an arrangement makes the support column have better stress-bearing performance, better stability, and less impact by horizontal earthquakes.

[0031] Optionally: the top of the above-mentioned bracket column is provided with a plurality of angle steels, and the plurality of angle steels are welded to each other to form a bearing platform, and the above-mentioned equipment room is fixedly connected to the bearing platform.

[0032] With such arrangement, the load-bearing platform formed by the above-mentioned angle steels plays the role of bearing the weight of the above-mentioned equipment room, and can better and evenly transfer the weight of the above-mentioned equipment room to the above-mentioned first steel pipe, the above-mentioned second steel pipe, the above-mentioned third steel pipe and the above-mentioned fourth steel pipe, thereby dispersing the gravity, improving the overall load-bearing capacity of the above-mentioned support column, and making the above-mentioned support column less likely to become unstable.

[0033] Based on the above description, the 1000kV lattice steel structure quadrilateral variable-section column for high-altitude areas disclosed by the utility model has the beneficial effects of low height, small equipment load, low center of gravity, small horizontal seismic force on the structure, not easy to become unstable, small steel consumption, low cost and small investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 This is a schematic diagram of the structure of a 1000kV lattice steel structure quadrilateral variable cross-section column in a high altitude area in an embodiment of the utility model;

[0036] Figure 2 It is a top view of a quadrilateral variable-section column of a 1000kV lattice steel structure in a high-altitude area in an embodiment of the utility model;

[0037] Figure 3 It is a schematic diagram of the column foot structure of the bracket column in the embodiment of the utility model.

[0038] Icons: 1-support column, 2-first steel pipe, 3-second steel pipe, 4-third steel pipe, 5-fourth steel pipe, 6-connector, 7-equipment room, 8-cantilever frame, 9-shock absorber, 10-node plate, 11-support rod, 12-first connecting plate, 13-second connecting plate, 14-first bottom plate, 15-second bottom plate, 16-third bottom plate, 17-fourth bottom plate, 18-reinforcement, 19-base, 20-anchor rod, 21-nut, 22-gasket. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Example

[0042] See also Figure 1 , Figure 2 and Figure 3 , This embodiment proposes a 1000kV lattice steel structure quadrilateral variable cross-section column in high altitude areas, including a support column 1;

[0043] The support column 1 comprises a first steel tube 2, a second steel tube 3, a third steel tube 4 and a fourth steel tube 5, the first steel tube 2, the second steel tube 3, the third steel tube 4 and the fourth steel tube 5 are parallel to each other and arranged at intervals, and the top ends of the first steel tube 2, the second steel tube 3, the third steel tube 4 and the fourth steel tube 5 are inclined to each other, close to each other and arranged at intervals;

[0044] A plurality of connectors 6 are connected in the gaps between the first steel tube 2, the second steel tube 3, the third steel tube 4 and the fourth steel tube 5;

[0045] An equipment room 7 is provided at the top of the support column 1 , and a cantilever frame 8 is provided on one side of the equipment room 7 . One end of the cantilever frame 8 is fixedly connected to the top of the support column 1 , and a shock absorber 9 is provided on the top surface of the cantilever frame 8 .

[0046] During installation, the first steel pipe 2, the second steel pipe 3, the third steel pipe 4 and the fourth steel pipe 5 of the bracket column 1 are arranged in a rectangular cross-section so that the top cross-sections of the first steel pipe 2, the second steel pipe 3, the third steel pipe 4 and the fourth steel pipe 5 are smaller than the bottom cross-sections, and then fixed between the first steel pipe 2 and the second steel pipe 3 or the second steel pipe 3 and the third steel pipe 4 or the third steel pipe 4 and the fourth steel pipe 5 or the fourth steel pipe 5 and the first steel pipe 2 through a plurality of connecting parts 6, the equipment room 7 and the cantilever frame 8 are both installed at the top of the bracket column 1, and finally, the shock absorber 9 is installed on the cantilever frame 8.

[0047] The 1000kV lattice steel structure quadrilateral variable cross-section column in high-altitude areas disclosed in this implementation scheme adopts a quadrilateral cross-section type cross-section layout, and a shock absorber 9 is arranged on the cantilever frame 8 at the top of the support column 1. As a result, the 1000kV lattice steel structure quadrilateral variable cross-section column in high-altitude areas has the beneficial effects of low height, small equipment load, low center of gravity, small horizontal seismic force on the structure, not easy to become unstable, small steel consumption, low cost and small investment.

[0048] See also Figure 1 , Figure 2 and Figure 3The first steel pipe 2, the second steel pipe 3, the third steel pipe 4 and the fourth steel pipe 5 are distributed in a quadrilateral cross-section type. This quadrilateral cross-section type has a low height, a small equipment load, a low center of gravity, a small horizontal seismic force on the structure and is not easy to become unstable. At the same time, the amount of steel used is more economical, saving investment.

[0049] Several connecting parts 6 have several node plates 10, and the several node plates 10 are evenly and staggeredly distributed on the adjacent first steel pipe 2, second steel pipe 3, third steel pipe 4 and fourth steel pipe 5. The several node plates 10 can support the connection between the first steel pipe 2, the second steel pipe 3, the third steel pipe 4 and the fourth steel pipe 5, thereby making the relative positions of the first steel pipe 2, the second steel pipe 3, the third steel pipe 4 and the fourth steel pipe 5 more stable.

[0050] A plurality of support rods 11 are provided between the node plates 10 between the adjacent first steel pipes 2 and second steel pipes 3 or the second steel pipes 3 and third steel pipes 4 or the third steel pipes 4 and fourth steel pipes 5 or the fourth steel pipes 5 and the first steel pipe 2, and first connecting plates 12 and second connecting plates 13 are provided at both ends of the plurality of support rods 11, respectively. The first connecting plates 12 and the second connecting plates 13 are respectively fixedly connected to the two ends of the support rods 11 along the axis of the support rods 11; the first connecting plates 12 and the second connecting plates 13 are respectively bolted to the node plates 10 between the adjacent first steel pipes 2 and second steel pipes 3 or the second steel pipes 3 and third steel pipes 4 or the third steel pipes 4 and fourth steel pipes 5 or the fourth steel pipes 5 and the first steel pipe 2, and the first connecting plates 12 and the second connecting plates 13 at both ends of the plurality of support rods 11 are interconnected with the plurality of node plates 10, which is convenient for installation and disassembly, and also ensures the overall stability and seismic resistance of the bracket column 1.

[0051] See also Figure 1 , Figure 2 and Figure 3 The bottom ends of the first steel pipe 2, the second steel pipe 3, the third steel pipe 4 and the fourth steel pipe 5 are respectively provided with a first bottom plate 14, a second bottom plate 15, a third bottom plate 16 and a fourth bottom plate 17, and the first steel pipe 2, the second steel pipe 3, the third steel pipe 4 and the fourth steel pipe 5 are respectively welded on the first bottom plate 14, the second bottom plate 15, the third bottom plate 16 and the fourth bottom plate 17, and the first bottom plate 14, the second bottom plate 15, the third bottom plate 16 and the fourth bottom plate 17 can improve the stress performance of the steel structure, save the amount of steel, and also well control the instability and deformation of the steel structure, have the effect of dispersing the force, and are less affected by horizontal earthquakes.

[0052] A plurality of reinforcing members 18 are provided at the angles between the first steel tube 2, the second steel tube 3, the third steel tube 4 and the fourth steel tube 5 and the first bottom plate 14, the second bottom plate 15, the third bottom plate 16 and the fourth bottom plate 17. The plurality of reinforcing members 18 are uniformly distributed along the radial direction of the first steel tube 2, the second steel tube 3, the third steel tube 4 and the fourth steel tube 5 and welded at the angles between the first steel tube 2, the second steel tube 3, the third steel tube 4 and the fourth steel tube 5 and the first bottom plate 14, the second bottom plate 15, the third bottom plate 16 and the fourth bottom plate 17. The plurality of reinforcing members 18 can strengthen the connection strength between the first steel tube 2, the second steel tube 3, the third steel tube 4 and the fourth steel tube 5 and the first bottom plate 14, the second bottom plate 15, the third bottom plate 16 and the fourth bottom plate 17, thereby improving the supporting effect and preventing the first steel tube 2, the second steel tube 3, the third steel tube 4 and the fourth steel tube 5 from collapsing under the action of an earthquake.

[0053] See also Figure 1 , Figure 2 and Figure 3 A base 19 is provided at the bottom of the first bottom plate 14, the second bottom plate 15, the third bottom plate 16 and the fourth bottom plate 17. The first bottom plate 14, the second bottom plate 15, the third bottom plate 16 and the fourth bottom plate 17 are all bolted to the base 19. The base 19 can lower the center of gravity of the bracket column 1, effectively control the overall instability and deformation of the structure, and improve the reliability of related equipment in high-altitude and high-seismic intensity areas.

[0054] A plurality of anchor rods 20 are vertically penetrated through the first base plate 14, the second base plate 15, the third base plate 16 and the fourth base plate 17, one end of the plurality of anchor rods 20 is embedded in the base 19, the other end of the plurality of anchor rods 20 has an external thread, and the other end of the plurality of anchor rods 20 is located at the top of the first base plate 14 or the second base plate 15 or the third base plate 16 or the fourth base plate 17, and a plurality of nuts 21 are threadedly connected to the external threads of the plurality of anchor rods 20. The first base plate 14, the second base plate 15, the third base plate 16 and the fourth base plate 17 are fixed by a plurality of pre-buried anchor rods 20, so that the support column 1 is more firmly fixed on the ground, and at the same time the bearing capacity of the support column 1 is improved, and the support column 1 is effectively prevented from becoming unstable and deformed due to earthquakes, and is suitable for environments in high altitudes and high seismic intensity areas.

[0055] Gaskets 22 are provided between the nuts 21 and the first base plate 14 or the second base plate 15 or the third base plate 16 or the fourth base plate 17. The gaskets 22 are sleeved on the external threaded sections of the anchor rods 20. The gaskets 22 effectively protect the first base plate 14, the second base plate 15, the third base plate 16 and the fourth base plate 17, avoid unnecessary wear of the first base plate 14, the second base plate 15, the third base plate 16 and the fourth base plate 17, and improve the overall service life of the steel frame.

[0056] The bottom and top cross-sections of the support column 1 are both square, and the bottom cross-section of the support column 1 is larger than the top cross-section of the support column 1, so that the support column 1 has better force-bearing performance, better stability, and is less affected by horizontal earthquakes.

[0057] The top of the bracket column 1 is provided with a plurality of angle steels, which are welded to each other to form a bearing platform (not shown in the figure). The equipment room 7 is fixedly connected to the bearing platform. The bearing platform composed of the plurality of angle steels plays the role of bearing the weight of the equipment room 7, and can better transfer the weight of the equipment room 7 to the first steel pipe 2, the second steel pipe 3, the third steel pipe 4 and the fourth steel pipe 5 evenly, thereby dispersing the gravity, improving the overall bearing capacity of the bracket column 1, and making the bracket column 1 less likely to become unstable.

[0058] See also Figure 1 , Figure 2 and Figure 3 In this embodiment, the height of the bracket column 1 is 5.936m. According to the calculation of the three-dimensional steel structure program, the bottom of the bracket column 1 adopts a square section with a side length of 1.2m, and the top of the bracket column 1 adopts a square section with a side length of 0.95m. This not only improves the stress performance and saves steel, but also effectively controls the instability and deformation of the steel structure.

[0059] See also Figure 1 , Figure 2 and Figure 3 In this embodiment, this technology considers optimizing the conventional triangular cross-section into a quadrilateral cross-section when the equipment height is high, the equipment load is large, the wind load is large, the seismic effect is large, and other horizontal forces are large. At the same time, a shock absorber 9 is installed on the top of the bracket column 1, and the conventional equal cross-section is improved to a variable cross-section type, which has good force performance and clear force transmission, reduces the seismic amplification coefficient of the bracket column 1 structure, saves the amount of steel structure, effectively controls the overall instability and deformation of the structure, improves the reliability of related equipment in high-altitude and high-seismic intensity areas, and has good comprehensive benefits.

[0060] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. 1000kV lattice steel structure quadrilateral variable cross-section column in high altitude areas, characterized by: Including bracket column; The support column comprises a first steel pipe, a second steel pipe, a third steel pipe and a fourth steel pipe, the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe are parallel to each other and arranged at intervals, and the top ends of the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe are inclined to each other and arranged at intervals; A plurality of connecting pieces are connected in the gaps between the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe; An equipment room is arranged at the top of the support column, a cantilever frame is arranged on one side of the equipment room, one end of the cantilever frame is fixedly connected to the top of the support column, and a shock absorber is arranged on the top surface of the cantilever frame.

2. The 1000kV lattice steel structure quadrilateral variable cross-section column for high altitude areas according to claim 1 is characterized in that: The first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe are distributed in a quadrilateral cross-section type.

3. The 1000kV lattice steel structure quadrilateral variable cross-section column for high altitude areas according to claim 1 is characterized in that: A plurality of the connecting members have a plurality of node plates, and the plurality of node plates are evenly and staggeredly distributed on the adjacent first steel pipes, the second steel pipes, the third steel pipes and the fourth steel pipes.

4. The 1000kV lattice steel structure quadrilateral variable cross-section column for high altitude areas according to claim 3 is characterized in that: A plurality of support rods are provided between the node plates between the adjacent first steel pipe and the second steel pipe, the second steel pipe and the third steel pipe, the third steel pipe and the fourth steel pipe, or the fourth steel pipe and the first steel pipe, and a first connecting piece and a second connecting piece are respectively provided at both ends of the plurality of support rods, and the first connecting piece and the second connecting piece are respectively fixedly connected to the two ends of the support rod along the axis of the support rod; The first connecting plate and the second connecting plate are respectively bolted to the node plates between the adjacent first steel pipe and the second steel pipe, the second steel pipe and the third steel pipe, the third steel pipe and the fourth steel pipe, or the fourth steel pipe and the first steel pipe.

5. The 1000kV lattice steel structure quadrilateral variable cross-section column for high altitude areas according to claim 1 is characterized in that: The bottom ends of the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe are respectively provided with a first bottom plate, a second bottom plate, a third bottom plate and a fourth bottom plate, and the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe are respectively welded to the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate.

6. The 1000kV lattice steel structure quadrilateral variable cross-section column for high altitude areas according to claim 5 is characterized in that: A plurality of reinforcing members are provided at the angles between the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe and the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate. The plurality of reinforcing members are evenly distributed along the radial direction of the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe and are welded at the angles between the first steel pipe, the second steel pipe, the third steel pipe and the fourth steel pipe and the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate.

7. The 1000kV lattice steel structure quadrilateral variable cross-section column for high altitude areas according to claim 5 is characterized in that: The bottoms of the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate are all provided with a base, and the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate are all bolted to the base.

8. The 1000kV lattice steel structure quadrilateral variable cross-section column for high altitude areas according to claim 7 is characterized in that: A plurality of anchor rods are vertically penetrated through the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate, one end of each of the anchor rods is embedded in the base, the other end of each of the anchor rods has an external thread, and the other end of each of the anchor rods is located at the top of the first bottom plate, the second bottom plate, the third bottom plate or the fourth bottom plate, and a plurality of nuts are threadedly connected to the external threads of each of the anchor rods.

9. The 1000kV lattice steel structure quadrilateral variable cross-section column for high altitude areas according to claim 8, characterized in that: Gaskets are provided between the nuts and the first base plate, the second base plate, the third base plate, or the fourth base plate, and the gaskets are sleeved on the external threaded sections of the anchor rods.

10. The 1000kV lattice steel structure quadrilateral variable cross-section column for high altitude areas according to claim 1, characterized in that: The bottom and top cross-sections of the support column are both square, and the bottom cross-section of the support column is larger than the top cross-section of the support column.

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